of philadelphia



@uitrit @tetes stas-t @titre L. .I M. HART, or PHILADELPHIA, PENNSYLVANIA..

Letters-Patent No. 60,723, lated January 1, 1867..

IMPROVEMENT. 1N .MAKING STEEL-'HEADED-RAIIS.

@ha Stighierttemh in in time @elim @sind aut millimetri si itt am;

Be it known that I, L. HART, of Philndelphis's,l iii the county"ofQPhilsdolphis, and'vS'tsteof`P`enusylvenin, have inventede new und improved Steel-Headed Rail; and'I do 'herebjf declare that the following is s. full, clear, and exsct description thereof, which will enable others sliilledin-the 'srt to make and use-the ssme,. reference being had to the accompanying drawings, forming part of this-speciicution, in whiehyi Figure 1 represents utransverse section of the pile before rollingf. I

Figure 2 is a. similar section of 'the rail when rolled,

Similar letters of reference indicate like parte. x v

This invention consists in rolling or otherwise producing. grooves or" roughnesses upon thi suriceof a. plate or mess of steel, and subsequently welding such plate or mess ou s plntebs.r, or mass of ironi`or` the pure,- pose of formingth head of a :eil in such a. manner that advantage is taken of the superior hardness of the steel, i causing the same to penetrate the iron, and to produce a. grenter surface for the weld, amd e sort of dove-ceiling between the two metals; and thereby a steel-headed mil is produced, from which theheal is less liable to sepu rate than it does from steel-headed rails made in the ordineryway.

A represents a. ber or mass of steel, whichismnde undulating or corrugstetl'at its-under surface,- andv is` welded tou 'bnr or mass, B, of iron. In welding the two mssses together, the projections or'undulatious of theI steel penetrate the iron, und thereby the welding surface is increased; lnd', furthermore, said two masses are caused to interlock with-each other, thus producing a. mechanical connection, in addition to the connection producedby the welding operation. The mess oi" iron end steel -thus ,obtained niny'be then planned' on tire-top; of a pile,- thesteelside up, and the whole is heated and rolled'in the ordinary manner, or the rough-erred" steel. slab may be welded directly upon the-pile. The-rails obtainedb'y thiswperstion show morose-section somewhat:

like that shown in iig. 210i the draw-ings, the steel hemd*heingmly'interloeked" with and united tothey iron,

which, hy" the welding operation, is formed into one mass, and bythese means a-steel-h'eaded rail is obtsinedl from which the steel is not liable to separate.

I do not claimthe use of a. slsb of steel to form that part of eupile of which is formed the head of" s. rail nor do I claim the welding of s piece of steel upon s. piece of-iron, before it is placed in the pile7 for theY purpose of forming the heedv of a. ruil; but what I'clnirn as new, und desire to-secure hyA Letters Pstent,.is-

I claim a. fnggot for making e steel-capped railroad rail, composed of the corrugatedA steel bar and'iron.

her B, arranged and piled with the other perts,.in the manner shown and describedv i Witnesses:

Ones. S. Hmcnmn, Amex. F. RoTLrNsnmir. 

